Finding the Fourth Proportional to 1,123.04, 1,549.88 and 625.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.04 : 1,549.88 = 625.72 : x
2. Step 2: Convert to fraction form
   1,123.04/1,549.88 = 625.72/x
3. Step 3: Cross multiply
   1,123.04x = 1,549.88 × 625.72
4. Step 4: Simplify right side
   1,123.04x = 969,790.91
5. Step 5: Solve for x
   x = 969,790.91/1,123.04
6. Step 6: Final answer
   x = 863.54